Cylindrical filter bag mechanical property testing device

Abstract

The invention discloses a barrel-shaped filter bag mechanical property testing device which comprises a sample and a compressor and further comprises a base support, a flow dividing device, an air injection device, an adjusting device and a protective cover, the compressor is arranged in the base support and located below the base support, the flow dividing device is located above the base support and connected with the compressor, and the air injection device is connected with the adjusting device. The sample is located above the flow dividing device, the lower end of the sample is arranged in the flow dividing device in an inserted mode, the air injection device is vertically arranged in the sample and connected with the flow dividing device, and the adjusting device is vertically arranged in the center of the air injection device and connected to the air injection device. When an experiment is carried out, the test sample can be subjected to the experiment in a cylindrical shape so as to fit the shape of the test sample in the using process, and therefore the test sample working environment under the actual working condition in a bag type dust collector project can be simulated to the maximum extent under the laboratory condition.

Description

Technical Field

[0001] This invention relates to the field of dust removal technology, specifically to a device for testing the mechanical properties of cylindrical filter bags. Background Technology

[0002] In recent years, the main cause of smog in my country has been excessive industrial emissions from enterprises, including steel mills, power plants, cement plants, waste incineration plants, and chemical plants. Therefore, to ensure air quality, national policies have increasingly tightened emission standards. To ensure production, baghouse dust collectors have become necessities for factories, and filter bags, as the main consumables of baghouse dust collectors, are seeing a steady increase in market demand.

[0003] The mechanical properties of the filter bag also have a significant impact on its performance. These mechanical properties include tensile strength and elongation at break. Especially during the filter bag cleaning process, the cleaning action is performed on average every 30 minutes. Each cleaning pulse airflow applies multiple instantaneous pressures to the filter bag, resulting in a high frequency and number of airflow impacts on the filter bag. During these multiple impacts, the filter bag is prone to damage, especially at the seams.

[0004] Currently, filter bag performance testing includes filtration performance and mechanical properties, with mechanical properties determining the filter bag's service life. The mechanical properties of filter bags are still tested using traditional fabric mechanical property testing instruments. This involves cutting tubular fabric into standard dimensions and using the mechanical properties of a single piece of fabric to measure the filter bag's mechanical properties and thus evaluate its service life. However, in actual use, filter bags are typically used in a tubular structure, and planar mechanical property testing cannot systematically measure both mechanical properties and service life. Summary of the Invention

[0005] The present invention aims to overcome the shortcomings of existing mechanical performance testing instruments, which use the mechanical properties of a single piece of fabric to measure the mechanical properties of filter bags and thus evaluate their service life. However, in actual use, filter bags are used in a cylindrical structure, and planar mechanical performance testing cannot systematically measure mechanical properties and service life.

[0006] A mechanical property testing device for a cylindrical filter bag is proposed, comprising a sample and a compressor, as well as a base support, a flow divider, an air jet device, an adjustment device, and a protective cover. The compressor is located inside and below the base support. The flow divider is located above the base support and connected to the compressor. The sample is located above the flow divider, with its lower end inserted into the flow divider. There are three sets of air jet devices, all vertically positioned inside the sample and connected to the flow divider. The adjustment device is vertically positioned at the center of the air jet device and connected to it. The protective cover is located above the base support and covers the sample.

[0007] In this invention, the sample is placed in a protective cover in a cylindrical shape during testing. The shape of the cylinder is the same as the shape of the sample during use. Then, during testing, a jetting device injects gas into the sample, causing it to expand. This simulates the expansion state that the sample would experience during use, thus enabling the measurement of the mechanical properties of the sample using a cylindrical structure. This addresses the shortcomings of existing mechanical property testing instruments, which use the mechanical properties of a single piece of fabric to measure the mechanical properties of filter bags and thus evaluate their service life. However, in actual use, the filter bags are in a cylindrical structure, and planar mechanical property testing cannot systematically measure both mechanical properties and service life.

[0008] In a preferred embodiment of the present invention, the compressor used is a screw compressor, and a pressure regulating valve is provided at the air outlet of the compressor. The pressure regulating valve is connected to the compressor and the distribution device through an air guide pipe. The compressed air can be injected into the interior of the distribution device through the guide pipe. During use, the pressure of the airflow can be adjusted by the pressure regulating valve.

[0009] In a preferred embodiment of the present invention, the diversion device includes a fixed cylinder, a partition, a four-way connector, a three-way reversing valve, a guide tube, air needles, an impact force sensor, and a sponge. The fixed cylinder is mounted on a base support. The partition is horizontally mounted inside the fixed cylinder. The four-way connector is located below the partition and connected to the air guide tube. There are three three-way reversing valves, each located at one of the three air outlets of the four-way connector. There are three air needles, each vertically mounted above the partition. Each air needle has a guide tube inside. The impact force sensor is located above the partition and at the center of the partition. The sponge is located above the partition and positioned around the sample. The sponge is arranged in a ring around the sample to protect it.

[0010] In a preferred embodiment of the present invention, each air needle is provided with a baffle in the middle, and a first air outlet and a second air outlet are provided on the baffle. The guide tube is connected to the first air outlet, so the air entering the three-way reversing valve can be adjusted in direction by the three-way reversing valve and then sprayed out from the first air outlet.

[0011] In a preferred embodiment of the present invention, each air needle is further provided with a guide tube inside, and the two ends of the guide tube are respectively connected to a three-way reversing valve and a second air outlet. Each air needle has an external thread on its outer wall that mates with the jetting device. Therefore, the air entering the three-way reversing valve can be sprayed out from the second air outlet after its direction is adjusted by the three-way reversing valve, in addition to the first air outlet, thereby meeting different usage requirements.

[0012] In a preferred embodiment of the present invention, the jetting device includes a connector, a threaded cylinder, a jetting pipe, a plug, and a permanent magnet. The connector is inserted into the air needle, the threaded cylinder is located below the connector and connected to the air needle, the jetting pipe is vertically mounted on the connector, the plug is slidably mounted inside the jetting pipe, and the permanent magnet is mounted inside the plug and cooperates with the adjusting device. The jetting pipes of the three jetting devices are evenly arranged with the axis of the filter bag as the center, and the air outlets of the three jetting pipes are all aligned with the inner wall of the filter bag. Therefore, the airflow ejected through the jetting pipe can directly contact the inner wall of the filter bag.

[0013] In a preferred embodiment of the present invention, the connector is provided with a first air inlet, a second air inlet, and a gasket. The first and second air inlets are respectively connected to the first and second air outlets, and both the first and second air inlets are provided with gaskets. The first air inlet is connected to the jet pipe. After the connector is inserted into the air needle, the first and second air inlets will be inserted into the first and second air outlets, respectively. At this time, the gasket will contact the baffle to ensure sealing.

[0014] In a preferred embodiment of the present invention, the jet pipe is provided with a telescopic tube inside, and the two ends of the telescopic tube are respectively connected to the block and the second air inlet. The block has a channel inside, and a sealing gasket is provided at the lower end of the block. The sealing gasket is adhered to the block and contacts the inner wall of the jet pipe, thereby sealing the gap between the block and the inner wall of the jet pipe. Therefore, after the block is placed inside the jet pipe, when the first air inlet injects gas into the jet pipe, the air outlet of the jet pipe located below the block will eject air.

[0015] In a preferred embodiment of the present invention, the adjusting device includes a fixed plate, a fixed bracket, a screw, a motor, a main gear, a secondary gear, a slider, and limiting rods. The fixed plate is disposed on the connector head, the fixed bracket is disposed at the center of the fixed plate, the screw is vertically connected to the fixed bracket, the motor is located below the fixed bracket, the main gear is connected to the output shaft of the motor, the secondary gear is disposed below the screw, and the main gear and the secondary gear mesh with each other. The slider is threadedly connected to the screw, and there are two limiting rods respectively disposed on both sides of the screw. The limiting rods pass through the preset through holes of the slider. The motor used is a servo motor, and the motor is equipped with a wireless controller, so the motor can be started or stopped indefinitely.

[0016] In a preferred embodiment of the present invention, the slider is provided with three fixed rods, each with a battery above it and an electromagnet at its end. The electromagnets are electrically connected to the batteries, and the positions of the three electromagnets correspond to the three blocks respectively. When the electromagnets are energized, they will generate a magnetic connection with the permanent magnet. Therefore, when the electromagnets move up and down, they can drive the blocks to move up and down through the permanent magnets.

[0017] The beneficial effects of this invention compared to the prior art are: In this invention, the sample is tested in a cylindrical shape to simulate the state of the sample during use. This allows for the simulation of the filter bag working environment under actual working conditions in a bag filter project to the greatest extent possible under laboratory conditions. Furthermore, the adjustment device can move the position of the blockage as needed to conduct experiments on specific locations on the inner wall of the sample. Attached Figure Description

[0018] Figure 1 A schematic diagram of a mechanical performance testing device for a cylindrical filter bag; Figure 2 This is a schematic diagram of the internal structure of the protective cover of a cylindrical filter bag mechanical performance testing device (the protective cover is a whole, with one part removed to show the internal structure). Figure 3 A schematic diagram of the protective cover structure of a cylindrical filter bag mechanical performance testing device; Figure 4 A schematic diagram of the compressor structure of a cylindrical filter bag mechanical performance testing device; Figure 5 A schematic diagram of a limiting ring structure for a cylindrical filter bag mechanical performance testing device; Figure 6 This is a schematic diagram of the flow divider structure of a cylindrical filter bag mechanical performance testing device (the fixed cylinder is a single unit, with one piece removed to show the internal structure). Figure 7 This is a schematic diagram of the internal structure of the fixed cylinder of a cylindrical filter bag mechanical performance testing device (the fixed cylinder is a whole, with one part removed to show the internal structure). Figure 8 for Figure 7 A schematic diagram of point A; Figure 9 A schematic diagram of the air needle structure of a cylindrical filter bag mechanical performance testing device; Figure 10 This is a schematic diagram of the internal structure of the air needle in a cylindrical filter bag mechanical performance testing device (the air needle is a single unit, with a section removed to show the internal structure). Figure 11 This is a schematic diagram of the air jet device structure of a cylindrical filter bag mechanical performance testing apparatus (the sample is a whole, with a piece removed to show the internal structure). Figure 12 This is a schematic diagram of the connector and air needle connection structure of a cylindrical filter bag mechanical performance testing device. Figure 13 This is a schematic diagram of the internal structure of the connector of a cylindrical filter bag mechanical performance testing device (the connector is a single unit, with a section removed to show the internal structure). Figure 14 This is a schematic diagram of the connector and air needle internal structure of a cylindrical filter bag mechanical performance testing device (the connector and air needle are a single unit; a section has been removed to show the internal structure). Figure 15 This is a schematic diagram of the connector and air jet pipe connection structure of a cylindrical filter bag mechanical performance testing device (the connector and air jet pipe are a single unit; a section has been removed to show the internal structure). Figure 16 This is a schematic diagram of the internal structure of the air jet pipe in a cylindrical filter bag mechanical performance testing device (the air jet pipe is a single unit, with a section removed to show the internal structure). Figure 17 A schematic diagram of the plug structure of a cylindrical filter bag mechanical performance testing device; Figure 18 This is a schematic diagram of the internal structure of the plug of a cylindrical filter bag mechanical performance testing device (the plug is a whole, with a piece removed to show the internal structure). Figure 19 A schematic diagram of the adjustment device structure of a cylindrical filter bag mechanical performance testing device; Figure 20 A schematic diagram of the fixing plate structure of a cylindrical filter bag mechanical performance testing device; Figure 21 This is a schematic diagram of the meshing structure of the main gear and the auxiliary gear in a cylindrical filter bag mechanical performance testing device. Figure 22 A schematic diagram of the connection structure between the fixing rod and the slider in a cylindrical filter bag mechanical performance testing device; In the diagram: 1-Sample, 2-Compressor, 21-Pressure regulating valve, 22-Gas guide pipe, 3-Base bracket, 31-Limiting ring, 4-Diverter, 41-Fixing cylinder, 42-Baffle, 43-Four-way connector, 44-Three-way reversing valve, 45-Guide pipe, 46-Gas needle, 47-Impact sensor, 48-Sponge, 5-Air jet device, 51-Connector, 52-Threaded cylinder, 53-Air jet pipe, 54-Block, 55-Permanent magnet, 5 6-First air inlet cylinder, 57-Second air inlet cylinder, 58-Gasket, 59-Telescopic tube, 6-Adjusting device, 61-Fixing plate, 62-Fixing bracket, 63-Screw, 64-Motor, 65-Main gear, 66-Second gear, 67-Slider, 68-Limit rod, 7-Protective cover, 8-Baffle, 81-First air outlet cylinder, 82-Second air outlet cylinder, 83-Guide tube, 9-Fixing rod, 91-Battery, 92-Electromagnet, 10-Sealing gasket. Detailed Implementation

[0019] The following will refer to the appendices in the embodiments of the present invention. Figure 1-22 The technical solutions in the embodiments of the present invention will be described in detail below.

[0020] Example 1 like Figure 1-2 As shown, a cylindrical filter bag mechanical performance testing device includes a sample 1 and a compressor 2, as well as a base support 3, a flow divider 4, an air jet device 5, an adjustment device 6 and a protective cover 7. The compressor 2 is disposed inside the base support 3 and located below the base support 3.

[0021] like Figure 1-2 As shown, the compressor 2 is connected to the flow divider 4, so the airflow compressed by the compressor 2 can be introduced into the interior of the flow divider 4. The flow divider 4 is located above the base bracket 3 and is connected to the jet device 5.

[0022] like Figure 1-2 As shown, after the airflow enters the interior of the diversion device 4, it can be guided into the interior of the jet device 5 through the diversion device 4, and finally ejected through the jet device 5, so that the airflow comes into contact with the sample 1. The sample 1 is located above the diversion device 4 (the sample 1 used is a filter bag), and the lower end of the sample 1 is inserted into the interior of the diversion device 4.

[0023] like Figure 1-2 As shown, the top of the sample 1 is connected to the machine's pipe. The protective cover 7 has a through hole to facilitate the entry of the machine's pipe. The jetting device 5 is vertically installed inside the sample 1 and connected to the diversion device 4. Therefore, the gas ejected through the jetting device 5 can be sprayed into the interior of the sample 1 to simulate the state of external air entering the interior of the sample 1 when the machine is in use.

[0024] like Figure 1-2 As shown, the adjustment device 6 is vertically set at the center of the jet device 5 and connected to the jet device 5. The sample 1 used is cylindrical. The adjustment device 6 can adjust the position of the airflow sprayed inside the sample 1, so as to conduct experiments on specific positions of the sample 1.

[0025] like Figure 1-2 As shown, the protective cover 7 is set above the base bracket 3 and covers the sample 1. The protective cover 7 can be made of transparent explosion-proof glass, so as to facilitate the observation of the test state of the sample 1. Therefore, during the experiment, an external high-speed camera can be used to capture the state of the sample 1 during the experiment, thereby capturing the force change of the sample 1 at high frequency.

[0026] like Figure 3-4 As shown, the compressor 2 used is a screw compressor 2 (the screw compressor 2 used is an existing product, so it will not be described in detail). The compressor 2 is an air compressor 2. The air outlet of the compressor 2 is equipped with a pressure regulating valve 21, which is mechanically fixed to the compressor 2.

[0027] like Figure 3-4As shown, the pressure regulating valve 21 is connected to the compressor 2 and the flow divider 4 via the air guide pipe 22. Therefore, the air compressed by the compressor 2 can be injected into the interior of the flow divider 4 through the guide pipe, and the pressure of the airflow can be adjusted by the pressure regulating valve 21 during use.

[0028] like Figure 5-8 As shown, the diversion device 4 includes a fixed cylinder 41, a partition 42, a four-way connector 43, a three-way reversing valve 44, a guide tube 45, an air needle 46, an impact force sensor 47, and a sponge 48. The fixed cylinder 41 is located above the base bracket 3, and external threads are provided on the outer wall of the fixed cylinder 41.

[0029] like Figure 5-8 As shown, a limiting ring 31 is provided on the base bracket 3. The limiting ring 31 and the fixed cylinder 41 are arranged on the same axis, and the inner wall of the limiting ring 31 is provided with an internal thread. The specification of the internal thread on the inner wall of the limiting ring 31 corresponds to the specification of the external thread on the outer wall of the fixed cylinder 41.

[0030] like Figure 5-8 As shown, the fixed cylinder 41 can be threaded onto the limiting ring 31, and the limiting ring 31 is fixedly connected (such as mechanically fixed, welded or bonded) to the base bracket 3, thereby preventing the fixed cylinder 41 from shifting during the test.

[0031] like Figure 5-8 As shown, the partition 42 is horizontally arranged inside the fixed cylinder 41 and is fixedly connected to the inner wall of the fixed cylinder 41. The four-way connector 43 is arranged inside the fixed cylinder 41 and is located below the partition 42. The end of the air guide pipe 22 is connected to the air inlet of the four-way connector 43.

[0032] like Figure 5-8 As shown, there are three three-way reversing valves 44, which are respectively installed at the three air outlets of the four-way valve (all three three-way reversing valves 44 are electric valves, and all three electric three-way reversing valves 44 are equipped with remote control components). The three-way reversing valves 44 are connected to the air outlets of the four-way valve through pipes.

[0033] like Figure 5-8 As shown, the airflow injected into the four-way connector 43 is then injected into the interior of the three-way reversing valve 44 after being diverted. All three three-way reversing valves 44 are mechanically fixed on the fixed cylinder 41. There are three air needles 46, all of which are vertically arranged above the partition 42, and the positions of the air needles 46 correspond to the positions of the three-way reversing valves 44.

[0034] like Figure 5-8 As shown, each air needle 46 is connected to a set of jet devices 5. The lower end of the air needle 46 is fixed on the partition plate 42. Each air needle 46 has a guide tube 45 inside. One end of the guide tube 45 is connected to an air outlet of a three-way reversing valve 44.

[0035] like Figure 5-8 As shown, the impact sensor 47 is located above the partition 42 and is positioned at the center of the partition 42. The impact sensor 47 is mechanically fixed to the partition 42. The lower end of the sample 1 is inserted into the fixed cylinder 41 and is in contact with the impact sensor 47.

[0036] like Figure 5-8 As shown, when the sample 1 expands and deforms, the impact force sensor 47 can measure the instantaneous impact force brought about by the expansion of the sample 1. The sponge 48 is located above the partition plate 42 and is connected to the inner wall of the fixed cylinder 41.

[0037] like Figure 5-8 As shown, the sponge 48 is provided at the positions of the impact sensor 47 and the air needle 46, so the impact sensor and the air needle 46 can pass through the sponge 48 and directly contact the lower part of the sample 1. The sponge 48 is arranged in a ring around the sample 1 to protect the sample 1.

[0038] like Figure 9-10 As shown, each air needle 46 has a horizontally arranged baffle 8 inside. The baffle 8 is fixedly connected to the inner wall of the air needle 46, and the baffle 8 is provided with a first air outlet 81 and a second air outlet 82. One end of the guide tube 45 is connected to one air outlet of the three-way reversing valve 44.

[0039] like Figure 9-10 As shown, the other end of the guide tube 45 is connected to the first air outlet 81. Therefore, the air entering the three-way reversing valve 44 can be adjusted in direction by the three-way reversing valve 44 and then sprayed out from the first air outlet 81. In addition to the guide tube 45, the air needle 46 is also provided with a guide tube 83.

[0040] like Figure 9-10 As shown, one end of the guide pipe 83 is connected to another air outlet of the three-way reversing valve 44, and the other end of the guide pipe 83 is connected to the second air outlet 82. Therefore, the air entering the three-way reversing valve 44 can be sprayed out from the second air outlet 82 after the direction is adjusted by the three-way reversing valve 44, in order to meet different usage requirements.

[0041] like Figure 9-10 As shown, each air needle 46 has an external thread on its outer wall that mates with the jet device 5, so the jet device 5 can be connected to the air needle 46 through the thread, thereby preventing the jet device 5 from falling off the air needle 46 during use.

[0042] like Figure 9-10As shown, the tip of the air needle 46 is inclined, which facilitates the air needle 46 tip to puncture the filter bag, that is, the air needle 46 tip can pierce into the interior of the filter bag from the outside. If the diameter of the air needle 46 is too large to facilitate puncture, a through hole can be opened at the position corresponding to the air needle 46 at the lower end of the sample 1, so that the air needle 46 can pierce into the interior of the sample 1 from the preset through hole.

[0043] like Figure 11-12 As shown, the jet device 5 includes a connector 51, a threaded cylinder 52, a jet pipe 53, a plug 54, and a permanent magnet 55. The connector 51 is inserted into the air needle 46. The threaded cylinder 52 is located at the lower end of the connector 51. The threaded cylinder 52 has an internal thread and is rotatably connected to the connector 51.

[0044] like Figure 11-12 As shown, the air needle 46 passes through the middle of the threaded cylinder 52 and is connected to the connector 51. The thread on the inner wall of the threaded cylinder 52 corresponds to the thread specification on the outer wall of the air needle 46. Therefore, the connector 51 is inserted into the air needle 46.

[0045] like Figure 11-12 As shown, the connector 51 and the air needle 46 can be connected together by the threads on the inner wall of the threaded cylinder 52 and the threads on the outer wall of the air needle 46. The air jet pipe 53 is inserted into the connector 51, and the lower end of the air jet pipe 53 is fixedly connected to the connector 51.

[0046] like Figure 11-12 As shown, the jet pipe 53 is hollow, and multiple sets of air outlets are opened on the pipe wall of the jet pipe 53. The air outlets are arranged in accordance with the axial direction of the jet pipe 53, and the axial direction of the jet pipe 53 is consistent with the axial direction of the filter bag.

[0047] like Figure 11-12 As shown, the air jet pipes 53 of the three sets of air jet devices 5 are evenly arranged with the axis of the filter bag as the center, and the air outlets of the three air jet pipes 53 are all aligned with the inner wall of the filter bag. Therefore, the airflow ejected through the air jet pipes 53 can directly contact the inner wall of the filter bag. like Figure 13-15 As shown, the connector 51 is also equipped with a first air inlet cylinder 56, a second air inlet cylinder 57 and a gasket 58. The positions of the first air inlet cylinder 56, the second air inlet cylinder 57 and the first air outlet cylinder 81 and the second air outlet cylinder 82 are corresponding.

[0048] like Figure 13-15 As shown, the first air inlet cylinder 56 and the second air inlet cylinder 57 are respectively inserted into the first air outlet cylinder 81 and the second air outlet cylinder 82. The ends of the first air inlet cylinder 56 and the second air inlet cylinder 57 are provided with gaskets 58. The first air inlet cylinder 56 and the second air inlet cylinder 57 are also provided with gaskets 58.

[0049] like Figure 13-15 As shown, the gasket 58 is bonded and fixed to the ends of the first air inlet cylinder 56 and the second air inlet cylinder 57. After the connector 51 is inserted into the air needle 46, the first air inlet cylinder 56 and the second air inlet cylinder 57 will be inserted into the first air outlet cylinder 81 and the second air outlet cylinder 82 respectively.

[0050] like Figure 13-15 As shown, at this time, the gasket 58 will come into contact with the baffle 8 to ensure sealing. The air outlet of the first air inlet 56 is located inside the air inlet of the jet pipe 53. Therefore, the airflow ejected from the first air outlet 81 can be injected into the interior of the jet pipe 53 through the first air inlet 56 and then ejected through the jet pipe 53.

[0051] The movement process in this embodiment is as follows: After the tops of the three air needles 46 are inserted into the interior of the sample 1 from the outside, the lower end of the sample 1 can be placed into the interior of the fixing cylinder 41, and the three air needles 46 are inserted into the interior of the sample 1 from the lower end.

[0052] The puncture sites of the three air needles 46 (the contact points between the outside of the air needles 46 and the sample 1) are all sealed with rubber materials (such as rubber rings or rubber gaskets 58) to prevent air leakage. Then, the connector 51 can be inserted and connected to the upper end of the air needles 46.

[0053] When connecting the connector 51 and the air needle 46, it is necessary to ensure that the positions of the first air inlet 56 and the second air inlet 57 correspond to the positions of the first air outlet 81 and the second air outlet 82. After inserting the connector 51 into the air needle 46, rotate the threaded cylinder 52 clockwise, thereby driving the connector 51 to move downward through the thread.

[0054] Once the gasket 58 seals the gap between the first air inlet cylinder 56 and the second air inlet cylinder 57 and the first air outlet cylinder 81 and the second air outlet cylinder 82, the rotation of the threaded cylinder 52 can be stopped, and then the top opening of the sample 1 can be pulled out from the top opening of the protective cover 7.

[0055] After connecting the top opening of sample 1 to the machine's pipe, cover sample 1 with protective cover 7, and then turn on compressor 2. After compressor 2 is turned on, the compressed air will be injected into the four-way connector 43. After being diverted by the four-way connector 43, it will enter the three-way reversing valve 44.

[0056] After the direction is adjusted by the three-way reversing valve 44, the air will be injected into the interior of the jet pipe 53 through the guide pipe 45, the first air outlet 81 and the first air inlet 56, and finally ejected through the jet pipe 53. The airflow ejected by the jet pipe 53 will come into contact with the inner wall of the sample 1, thereby causing the sample 1 to deform.

[0057] When the sample 1 deforms, it will come into contact with the impact force sensor 47. At this time, the impact force sensor 47 can measure the instantaneous impact force brought about by the expansion of the sample 1. A pressure regulating valve 21 is provided at the outlet of the compressor 2.

[0058] Therefore, during testing, the relevant parameters (such as pressure) of the airflow ejected from the jet pipe 53 can be adjusted by the pressure regulating valve 21 according to its own needs. When the sample 1 expands, it will come into contact with the impact force sensor 47. The impact force sensor 47 measures the impact force brought by the expansion of the sample 1. When the impact received by the impact force sensor 47 suddenly decreases, it can be determined that the sample 1 is broken.

[0059] Example 2 Based on Embodiment 1, the interior of the jet pipe 53 is further provided with a block 54, a sealing gasket 10, a permanent magnet 55 and a telescopic tube 59, and an adjustment device 6 is vertically provided in the middle position of the jet assembly.

[0060] like Figure 16-18 As shown, the block 54 is slidably disposed inside the jet pipe 53, and the block 54 is provided with an air flow channel. The specifications of the air outlet at the end of the air flow channel correspond to the specifications of the air outlet of the jet pipe 53. The telescopic pipe 59 is disposed below the block 54, and one end of the telescopic pipe 59 is connected to the air flow channel on the block 54.

[0061] like Figure 16-18 As shown, the other end of the telescopic tube 59 is connected to the second air inlet 57 (the telescopic tube used is an existing product, such as a PU spring air tube, so it will not be described in detail). Therefore, the airflow ejected through the second air inlet 57 can enter the interior of the block 54 through the telescopic tube 59 and finally be ejected through the air flow channel inside the block 54.

[0062] like Figure 16-18 As shown, the block 54 is slidably connected inside the jet pipe 53, so the block 54 can be replaced according to the usage requirements, thereby ensuring the number of air outlets in the air flow channel on the block 54. The jet pipe 53 is vertically arranged inside the sample 1.

[0063] like Figure 16-18 As shown, the air outlets at different positions on the jet pipe 53 correspond to different positions on the sample 1. Therefore, when the airflow is ejected from the jet pipe 53, it will simultaneously come into contact with the inner wall of the sample 1. When the air is ejected from the air outlet on the block 54, it will come into contact with the inner wall of the sample 1 at a specific position.

[0064] like Figure 16-18As shown, the more air outlets on the block 54, the more air will come into contact with the inner wall of the sample 1 through the air outlets of the block 54. Conversely, the fewer air outlets on the block 54, the less air will come into contact with the inner wall of the sample 1 through the air outlets of the block 54.

[0065] like Figure 16-18 As shown, when conducting the experiment, the specifications of the block 54 can be changed according to the size of the specific area to be tested. The lower end of the block 54 is also provided with a sealing gasket 10, and the sealing gasket 10 has a through hole at the end of the telescopic tube 59.

[0066] like Figure 16-18 As shown, the sealing gasket 10 is bonded to the plug 54 and the sealing gasket 10 is in contact with the inner wall of the jet pipe 53, thereby sealing the gap between the plug 54 and the inner wall of the jet pipe 53. Therefore, the plug 54 is installed inside the jet pipe 53.

[0067] like Figure 16-18 As shown, when the first air inlet 56 injects gas into the jet pipe 53, air will be ejected from the air outlet of the jet pipe 53 located below the block 54, while air will not be ejected from the air outlet of the jet pipe 53 located above the block 54.

[0068] like Figure 16-18 As shown, a groove is provided on the inner wall of the jet pipe 53, and the plug 54 and the sealing gasket 10 are provided with protrusions corresponding to the groove on the inner wall of the jet pipe 53. Therefore, when the plug 54 slides inside the jet pipe 53, the plug 54 will not rotate.

[0069] like Figure 16-18 As shown, the permanent magnet 55 is disposed inside the block 54, and the permanent magnet is bonded to the pre-set groove of the block 54. The jet pipe 53 used is made of non-magnetic material (such as plastic or aluminum), so it will not affect the magnetic field of the permanent magnet 55.

[0070] like Figure 19-21 As shown, the adjustment device 6 includes a fixed plate 61, a fixed bracket 62, a screw 63, a motor 64, a main gear 65, a secondary gear 66, a slider 67, and a limiting rod 68. The fixed plate 61 has through holes at the positions of the three jet pipes 53, and the fixed plate 61 is inserted into the connector 51.

[0071] like Figure 19-21 As shown, the fixed bracket 62 is located at the center of the fixed plate 61 (i.e., the center of the three jet components). The lower end of the fixed bracket 62 is mechanically fixed (e.g., with screws) to the fixed plate 61. The screw 63 is vertically located above the fixed bracket 62 and is rotatably connected to the fixed bracket 62 through a bearing.

[0072] like Figure 19-21As shown, the motor 64 is located below the fixed bracket 62 and mechanically fixed (e.g., with screws) to the fixed plate 61. The main gear 65 is located at the output shaft of the motor 64 and is fixedly connected to the output shaft of the motor 64 by a key. The motor 64 used is a servo motor 64, and the motor 64 is equipped with a wireless controller, so the motor 64 can be started or stopped wirelessly.

[0073] like Figure 19-21 As shown, the auxiliary gear 66 is located below the screw 63. The auxiliary gear 66 is connected to the end of the screw 63 and meshes with the main gear 65. Therefore, when the main gear 65 rotates, it can drive the screw 63 to rotate through the auxiliary gear 66. Both the main gear 65 and the auxiliary gear 66 used are bevel gears.

[0074] like Figure 19-21 As shown, a battery 91 is provided on the fixed plate 61, and the battery 91 is electrically connected to the motor 64 to provide power support to the motor 64. The slider 67 is located above the fixed bracket 62, and the slider 67 is threadedly connected to the screw 63. There are two limit rods 68, which are respectively set on both sides of the screw 63.

[0075] like Figure 19-21 As shown, the lower ends of the two limiting rods 68 are fixedly connected to the fixed bracket 62, and the limiting rods 68 pass through the preset through holes of the slider 67. Therefore, when the screw 63 rotates, it can drive the slider 67 to move up and down, and when the slider 67 moves up and down, the limiting rods 68 can guide the slider 67.

[0076] like Figure 19-21 As shown, the number of rotations of the output shaft of motor 64 within a unit time (e.g., 1 second) is limited to 1 rotation. When the output shaft of motor 64 rotates, it drives the screw 63 to rotate through the main gear 65 and the secondary gear 66. The ratio of the number of rotations of the output shaft of motor 64 and the screw 63 within a unit time is 1:1.

[0077] like Figure 19-21 As shown, when the output shaft of motor 64 rotates one revolution, screw 63 will also rotate one revolution. Since the pitch of screw 63 is 2mm, after the output end of motor 64 rotates one revolution, it can drive slider 67 to move 2mm through screw 63. Therefore, after the operator records the initial position of slider 67 and the rotation time of motor 64, the position of slider 67 can be calculated.

[0078] like Figure 22 As shown, the slider 67 is provided with three fixing rods 9, one end of each of the three fixing rods 9 is fixedly connected to the slider 67, and a battery 91 is provided above each of the three fixing rods 9, and the battery 91 is mechanically fixed to the fixing rod 9.

[0079] like Figure 22 As shown, each of the three fixing rods 9 has an electromagnet 92 at its other end. The electromagnet 92 is mechanically fixed (e.g., with screws) to the end of the fixing rod 9, and the positions of the three electromagnets 92 correspond to the positions of the block 54. Each electromagnet 92 on the fixing rod 9 is electrically connected to the battery 91 on its corresponding fixing rod 9, and each battery 91 on the three fixing rods 9 is equipped with a remote control switch (the remote control switch is an existing product, so it will not be described in detail).

[0080] like Figure 22 As shown, the remote control switch is connected in series in the circuit of electromagnet 92 and battery 91, and the three remote control switches are paired with the same remote control, so the three remote control switches can be controlled at the same time. After the electromagnet 92 is powered on, the electromagnet 92 will generate a magnetic connection with the permanent magnet 55.

[0081] like Figure 22 As shown, when the electromagnet 92 moves up and down, it can drive the block 54 to move up and down through the permanent magnet 55. The fixed rod 9 is connected to the slider 67, so when the slider 67 moves up and down, it can drive the fixed rod 9 and the electromagnet 92 to move up and down synchronously.

[0082] like Figure 22 As shown, after the staff records the initial position of slider 67 and the rotation time of motor 64, and calculates the position of slider 67, the position of block 54 inside jet pipe 53 can be obtained.

[0083] The motion process in this embodiment is as follows: After adjusting the air outlet direction of the three-way reversing valve 44 to ensure that the airflow enters the guide pipe 83 and is finally ejected through the second air inlet cylinder 57, the motor 64 can be started according to the position where the sample 1 needs to be tested, so that the motor 64 can drive the slider 67 to slide.

[0084] When the slider 67 slides, the electromagnet 92 will drive the block 54 to move synchronously through the permanent magnet 55 until the block 54 moves to the position required for the test of the sample 1. Then the compressor 2 can be turned on and the compressed airflow can be injected into the block 54. The airflow will then be ejected from the block 54 and will come into contact with the inner wall of the sample 1.

[0085] All parts not covered in this invention are the same as or can be implemented using existing technologies.

[0086] As described above, although the invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A mechanical property testing device for a cylindrical filter bag: comprising a sample (1) and a compressor (2), characterized in that: It also includes a base support (3), a flow divider (4), a jet device (5), an adjustment device (6), and a protective cover (7). The compressor (2) is located inside the base support (3) and below the base support (3). The flow divider (4) is located above the base support (3) and connected to the compressor (2). The sample (1) is located above the flow divider (4) and the lower end of the sample (1) is inserted into the flow divider (4). There are three sets of jet devices (5), all of which are vertically located inside the sample (1) and are connected to the flow divider (4). The adjustment device (6) is vertically located at the center of the jet device (5) and connected to the jet device (5). The protective cover (7) is located above the base support (3) and covers the sample (1).

2. The mechanical property testing device for a cylindrical filter bag according to claim 1, characterized in that: The compressor (2) used is a screw type, and a pressure regulating valve (21) is provided at the outlet of the compressor (2). The pressure regulating valve (21) is connected to the compressor (2) and the flow divider (4) through the air guide pipe (22).

3. The mechanical property testing device for a cylindrical filter bag according to claim 2, characterized in that: The diversion device (4) includes a fixed cylinder (41), a partition (42), a four-way connector (43), a three-way reversing valve (44), a guide tube (45), an air needle (46), an impact force sensor (47), and a sponge (48). The fixed cylinder (41) is mounted on the base support (3). The partition (42) is horizontally mounted inside the fixed cylinder (41). The four-way connector (43) is located below the partition (42) and connected to the air guide tube (22). There are three three-way reversing valves (44), which are respectively mounted at the three air outlets of the four-way connector (43). There are three air needles (46), which are all vertically mounted above the partition (42). Each air needle (46) has a guide tube (45) inside. The impact force sensor (47) is located above the partition (42) and is positioned at the center of the partition (42). The sponge (48) is located above the partition (42) and is positioned with the sample (1) as the center.

4. The mechanical property testing device for a cylindrical filter bag according to claim 3, characterized in that: Each air needle (46) has a baffle (8) arranged horizontally inside. The baffle (8) has a first air outlet (81) and a second air outlet (82). The guide tube (45) is connected to the first air outlet (81).

5. The mechanical property testing device for a cylindrical filter bag according to claim 4, characterized in that: Each air needle (46) is also provided with a guide tube (83) inside. The two ends of the guide tube (83) are connected to the three-way reversing valve (44) and the second air outlet (82) respectively. Each air needle (46) has an external thread on its outer wall that cooperates with the jet device (5).

6. The mechanical property testing device for a cylindrical filter bag according to claim 5, characterized in that: The jet device (5) includes a connector (51), a threaded cylinder (52), a jet pipe (53), a plug (54), and a permanent magnet (55). The connector (51) is inserted into the air needle (46). The threaded cylinder (52) is located below the connector (51) and connected to the air needle (46). The jet pipe (53) is vertically arranged on the connector (51). The plug (54) is slidably arranged inside the jet pipe (53). The permanent magnet (55) is arranged inside the plug (54) and cooperates with the adjustment device (6).

7. The mechanical property testing device for a cylindrical filter bag according to claim 6, characterized in that: The connector (51) is provided with a first air inlet (56), a second air inlet (57) and a gasket (58). The first air inlet (56) and the second air inlet (57) are respectively connected to the first air outlet (81) and the second air outlet (82), and both the first air inlet (56) and the second air inlet (57) are provided with gaskets (58). The first air inlet (56) is connected to the jet pipe (53).

8. The mechanical property testing device for a cylindrical filter bag according to claim 7, characterized in that: The jet pipe (53) has a telescopic pipe (59) inside. The two ends of the telescopic pipe (59) are connected to the block (54) and the second air inlet (57) respectively. The block (54) has a channel inside and a sealing gasket (10) at the lower end of the block (54).

9. The mechanical property testing device for a cylindrical filter bag according to claim 5, characterized in that: The adjusting device (6) includes a fixed plate (61), a fixed bracket (62), a screw (63), a motor (64), a main gear (65), a secondary gear (66), a slider (67), and a limiting rod (68). The fixed plate (61) is set on the connector (51), the fixed bracket (62) is set at the center of the fixed plate (61), the screw (63) is vertically connected to the fixed bracket (62), the motor (64) is located below the fixed bracket (62), the main gear (65) is connected to the output shaft of the motor (64), the secondary gear (66) is set below the screw (63), and the main gear (65) and the secondary gear (66) mesh with each other. The slider (67) is threadedly connected to the screw (63), and there are two limiting rods (68) respectively set on both sides of the screw (63). The limiting rods (68) pass through the preset through hole of the slider (67).

10. The mechanical property testing device for a cylindrical filter bag according to claim 9, characterized in that: The slider (67) is provided with three fixed rods (9), each of which is equipped with a battery (91) above it, and each of the three fixed rods (9) is equipped with an electromagnet (92) at its end. The electromagnet (92) is electrically connected to the battery (91), and the positions of the three electromagnets (92) correspond to the three blocks (54) respectively.

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